On the generation of lateral internal waves by a surface seiche in a partially mixed estuary |
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| Affiliation: | 1. Institute of Oceanographic Sciences, Crossway, Taunton, Somerset, TA1, 2DW, UK;1. Instituto de Química, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil;2. Department of Physics and Earth Sciences, Jacobs University Bremen, P.O. Box 750581, D-28725, Bremen, Germany;3. Departamento de Química, Universidade Federal de Santa Maria, C.P. 5051, 97105-970, Santa Maria, RS, Brazil;1. Civil and Coastal Engineering Department, University of Florida, USA;2. Institute of Marine and Coastal Sciences, Rutgers, The State University of New Jersey, USA;3. Horn Point Lab, University of Maryland Center for Environmental Science, USA;1. Univ. Bordeaux, EPOC, UMR5805, F33600 Pessac, France;2. CNRS, EPOC, UMR5805, F33600 Pessac, France |
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| Abstract: | Dyer (1982) observed internal oscillations in Southampton Water of predominantly 8 and 4 min periods. These were thought to be lateral standing waves generated by the interaction of the first- and second-order surface seiches, respectively, with estuarine topography. The present paper extends the work of Rattray (1960) to model the cross-sectional topography of Southampton Water, and shows that internal waves of the observed periods, wavelengths and amplitudes could indeed have been generated in the manner envisaged, but only near the times of certain internal resonant conditions. In general, about two or three such resonances occur per half tidal cycle, and this is in qualitative agreement with Dyer's observations. |
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